In the shadow of the Pacific Ring of Fire, cities like Vancouver are bracing for the inevitable. With a one-in-five chance of a major earthquake within 50 years, the need for proactive measures is more critical than ever. The city's lead seismic policy planner, Micah Hilt, is taking a bold step by inventorying and grading Vancouver's building stock for earthquake risk. This initiative, which mirrors efforts in Seattle and San Francisco, aims to identify and prioritize the most dangerous structures, potentially saving lives and reducing economic losses. But what makes this approach particularly fascinating is the focus on engineered wood, a material that could be the key to making buildings more resilient. As Christian Málaga-Chuquitaype, a structural engineering lecturer at Imperial College London, notes, timber buildings attract smaller seismic forces due to their lightness, an effect that becomes more pronounced in taller structures. Shake-table testing has demonstrated the effectiveness of cross-laminated timber towers, with a 10-storey structure absorbing over 100 simulated quakes without structural damage. This raises a deeper question: can timber help buildings bounce back from earthquakes? The answer, it seems, is a resounding yes, at least in controlled environments. However, the performance is not automatic in the most violent zones, where Japan's seismic codes push engineers toward framed systems and far heavier connections. This highlights a critical aspect of seismic engineering: the need for context-specific solutions. Vancouver's engineers are already judging mass timber as five times lighter than concrete and easier to design to a higher seismic standard. This is a significant development, as it suggests that timber could be a viable alternative to concrete in earthquake-prone regions. But what many people don't realize is that the use of timber in seismic engineering is not a new concept. Japan's seismic codes, which date back to the 1923 Great Kanto earthquake, have been instrumental in shaping modern seismic standards worldwide. The rocking-wall system proven at TallWood, for instance, could feed into the International Building Code, the standard behind much of the timber world's seismic engineering. In my opinion, the future of seismic-resistant buildings lies in the marriage of traditional wisdom and modern innovation. As cities like Vancouver continue to inventory and grade their building stock, the question of what to build next becomes increasingly important. The answer, I believe, lies in the thoughtful integration of engineered wood into the urban fabric. This not only enhances the resilience of our cities but also offers a more sustainable and environmentally friendly approach to construction. In conclusion, the use of timber in seismic engineering is a fascinating and potentially transformative development. As we continue to explore the possibilities, it is essential to remember that the key to success lies in the careful consideration of context and the integration of traditional wisdom with modern innovation. From my perspective, the future of earthquake-resistant buildings is bright, and engineered wood is at the forefront of this exciting new era.
